:root {
  --bg: #0b0f17;
  --bg2: #121826;
  --fg: #e8edf6;
  --muted: #93a0b8;
  --accent: #6ea8fe;
  --accent2: #8 b5ff;
  --ok: #4ade80;
  --bad: #f87171;
  --card: #161d2c;
  --line: #243047;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, #16203a 0%, var(--bg) 55%);
  color: var(--fg);
  -webkit-text-size-adjust: 100%;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: rgba(11,15,23,.8); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.logo { color: var(--accent); font-size: 22px; }
.brandname { font-size: 20px; letter-spacing: .3px; }
.tag { color: var(--muted); font-size: 12px; font-weight: 500; }
.top nav { display: flex; align-items: center; gap: 16px; }
.top nav a { color: var(--muted); font-size: 14px; }
.top nav a:hover { color: var(--fg); }

main { max-width: 880px; margin: 0 auto; padding: 0 20px 60px; }
.hero { padding: 56px 0 30px; text-align: center; }
.hero h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.15; margin: 0 0 14px; }
.hero h1 strong { color: var(--accent); }
.lede { color: var(--muted); font-size: 18px; max-width: 640px; margin: 0 auto 22px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 26px; }
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--fg);
  font-weight: 600; cursor: pointer; font-size: 14px;
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary { background: linear-gradient(180deg, #2a5bd7, #1f47b8); border-color: #2a5bd7; }
.btn.primary:hover { filter: brightness(1.08); }
.install-btn { background: transparent; border-color: var(--accent); color: var(--accent); }

.flow { display: flex; gap: 10px; align-items: center; justify-content: center; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.flow span { background: var(--card); border: 1px solid var(--line); padding: 6px 12px; border-radius: 999px; }
.flow .hl { color: var(--accent); border-color: var(--accent); }
.flow i { color: var(--line); font-style: normal; }

.block { padding: 34px 0; border-top: 1px solid var(--line); }
.block h2 { font-size: 24px; margin: 0 0 12px; }
.block p { color: #cdd6e6; }
code { background: #0e1626; border: 1px solid var(--line); padding: 1px 6px; border-radius: 6px; font-size: 13px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 18px; }
.cards article { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.cards article h3 { margin: 0 0 8px; font-size: 16px; color: var(--accent); }

textarea {
  width: 100%; background: #0e1626; color: var(--fg); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  resize: vertical;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0; }
.out {
  background: #0e1626; border: 1px solid var(--line); border-radius: 10px; padding: 14px;
  white-space: pre-wrap; word-break: break-word; font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  max-height: 420px; overflow: auto; margin: 6px 0 0;
}
.hint { color: var(--muted); font-size: 13px; }
.links { list-style: none; padding: 0; margin: 16px 0 0; }
.links li { padding: 8px 0; border-bottom: 1px solid var(--line); }

footer {
  max-width: 880px; margin: 0 auto; padding: 22px 20px 40px; color: var(--muted);
  display: flex; justify-content: space-between; font-size: 13px; border-top: 1px solid var(--line);
}
#verNum { color: var(--accent); }

@media (max-width: 560px) {
  .top nav a { display: none; }
  .flow { font-size: 12px; }
}